Quote collection
86 quotes — follow a thought to its full quote page.
"The first entirely vital action, so termed because it is not effected outside the influence of life, consists in the creation of the glycogenic material in the living hepatic tissue. The second entirely chemical action, which can be effected outside the influence of life, consists in the transformation of the glycogenic material into sugar by means of a ferment."
"With the aid of these active experimental sciences man becomes an inventor of phenomena, a real foreman of creation; and under this head we cannot set limits to the power that he may gain over nature through future progress of the experimental sciences."
"We must keep our freedom of mind, ... and must believe that in nature what is absurd, according to our theories, is not always impossible."
"The minds that rise and become really great are never self-satisfied, but still continue to strive."
"Progress is achieved by exchanging our theories for new ones which go further than the old, until we find one based on a larger number of facts. ... Theories are only hypotheses, verified by more or less numerous facts. Those verified by the most facts are the best, but even then they are never final, never to be absolutely believed."
"We achieve more than we know. We know more than we understand. We understand more than we can explain."